How to test trained classifiers for recognition

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Hi,

I have done some training already with OpenCV train_cascade. It went successfully. But i am wondering how can i test it without building a new app from scratch. 1. Are there any other application where can i put my classifier and can test a real time object recognition with it? 2. And is it possible to use more classifiers at the same time to recognize more objects?

Thank you very much for help.